ADCINC problem

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I want to test a very simple code, insamp (with two PGA and one ADC). When I run the code, it stop in the line:

if (ADCINC_1_fIsDataAvailable() != 0);

Below is the code, can anyone tell me what wrongs, thankks a lot in advance!

#include <m8c.h> // part specific constants and macros
#include "PSoCAPI.h" // PSoC API definitions for all User Modules
#include "PSoCGPioInt.h"

int iResult;

void main(void)
{
    PGA_1_Start(PGA_1_HIGHPOWER);
    PGA_2_Start(PGA_1_HIGHPOWER);
    ADCINC_1_Start(ADCINC_1_HIGHPOWER); /* Turn on ADC power */
   ADCINC_1_GetSamples(0);            /* Sample forever */

   while(1) {
     if (ADCINC_1_fIsDataAvailable() != 0) /* If ADC sample is ready... */
    {
        iResult = ADCINC_1_iGetData() + 2048; /* Get result, convert to unsigned and clear flag */
        ADCINC_1_fClearFlag();
     }
}
}

The general system setup as below:

VC1=sys/3

VC2=VC1/8

VC3=sys/1

Analog Power: SC on/RefH

RefMax:Vdd/2+/-BandGap

OpAmp bias Low

A-buff_power low

Switch Mode Pump OFF

Trip Voltage LVD4.81V

Including is my project codes.

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